Selectivity Regulation of Au/Titanate by Biochar Modification for Selective Oxidation of Benzyl Alcohol

Abstract

In organic synthesis, it is important to control the selectivity target product with high purity and reduce the cost of energy and equipment for separation. This study investigated supported gold catalysts on biochar-modified titanate-based nanofibers in order to regulate the catalytic performances by biochar content and surface properties. The catalysts were characterized by SEM, TEM, XRD, XPS, ICP-OES, UV-Vis to confirm their morphology, particle size distribution of Au NPs, crystal structures, oxidation state of Au and other key elements, real Au loading, and optical properties. In the test of selective oxidation of benzyl alcohol to benzaldehyde, the biochar modification could improve the selectivity toward benzaldehyde. Moreover, the influence of catalyst calcination conditions, reaction time, reaction atmospheres, reaction temperatures and solvent were systematically investigated. These results are useful for peer researchers in rational catalyst design.

Renewable Carbonaceous Materials from Biomass in Catalytic Processes: A Review

“…The study meticulously investigated the influence of biochar quantity and the temperature of pre-calcination treatments on the catalytic performance of the material. Furthermore, the incorporation of biochar demonstrated enhanced control over selectivity, particularly directing the reaction toward benzaldehyde, a challenging aspect in alcohol oxidation reactions (Figure 4) [108]. Catalytic oxidation of carbonyl compounds is equally pivotal in chemical and drug synthesis.…”

Carbon Quantum Dots/Cu2O Photocatalyst for Room Temperature Selective Oxidation of Benzyl Alcohol

“…Conventional procedures for carrying out this conversion typically rely on employing stoichiometric quantities of potent oxidizing agents (e.g., chromate, permanganate, and high-valent iodine as the inorganic oxidants) [ 3 ]. Chen [ 4 ] and Saffari’s [ 5 ] research groups obtained considerable benzaldehyde yields at high temperatures by employing noble metals Au and Pd, respectively. However, these methods have significant disadvantages, including high expenses, low productivity, stringent or fragile reaction conditions, and the generation of substantial waste by-products [ 6 ].…”

Phenomenal Insight into Electrochemically Induced Photocatalytic Degradation of Nitrobenzene on Variant Au-Modified TiO2 Nanotubes

“…This approach significantly enhanced degradation efficiency and reduced carrier recombination. However, in many studies concerning the surface modification of Au [12,13] on TiO 2 , there has been limited research on the optimal loading amount and the degradation of organic substances under a photo-electro field [14][15][16].…”